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WO2013036674A1 - Composés utiles pour traitement de troubles neurodégénératifs - Google Patents

Composés utiles pour traitement de troubles neurodégénératifs Download PDF

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Publication number
WO2013036674A1
WO2013036674A1 PCT/US2012/054007 US2012054007W WO2013036674A1 WO 2013036674 A1 WO2013036674 A1 WO 2013036674A1 US 2012054007 W US2012054007 W US 2012054007W WO 2013036674 A1 WO2013036674 A1 WO 2013036674A1
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Prior art keywords
groups
optionally substituted
compound according
nitrogen
sulfur
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PCT/US2012/054007
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English (en)
Inventor
Brian Scott Bronk
Wesley Francis Austin
Steffen Phillip Creaser
Nathan Oliver Fuller
Jed Lee HUBB
Jeffrey Lee Ives
Ruichao Shen
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Satori Pharmaceuticals, Inc.
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Publication of WO2013036674A1 publication Critical patent/WO2013036674A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J71/00—Steroids in which the cyclopenta(a)hydrophenanthrene skeleton is condensed with a heterocyclic ring
    • C07J71/0005—Oxygen-containing hetero ring

Definitions

  • the present invention relates to pharmaceutically active compounds useful for treating, or lessening the severity of, neurodegenerative disorders.
  • the present invention provides compounds useful for treating or lessening the severity of a neurodegenerative disorder.
  • the present invention also provides methods of treating or lessening the severity of such disorders wherein said method comprises administering to a patient a compound of the present invention, or composition thereof. Said method is useful for treating or lessening the severity of, for example, Alzheimer's disease.
  • the present invention provides a compound of formula I:
  • each R 1 is independently hydrogen, straight or branched Ci-6 alkyl, 3-6 membered cycloalkyl, or 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein each R 1 is optionally substituted with 1-4 R 2 groups, or:
  • R 1 groups are taken together to form a 3-7 membered heterocyclic ring having 0- 2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups; or
  • R 1 groups are taken together to form a 6-10 membered fused or spiro heterocyclic ring having 0-4 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups; each R 2 is independently R, halogen, -C(0)N(R) 2 , -N(R) 2 , -OR, -NR 3 S(0) 2 R 3 , oxo, - C(0)OR, Ci-3 alkyl optionally substituted with 1-3 R 3 groups, 3-6 membered cycloalkyl, 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein the cycloalkyl and heterocyclyl are each optionally substituted with 1-3 R 3 , or:
  • R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 3 is independently hydrogen, halogen, -OR, 3-6 membered cycloalkyl, -N(R) 2 , C 1-3 alkyl optionally substituted with 1-3 R 4 groups, or:
  • R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 4 is independently hydrogen, halogen, C 1-3 alkyl optionally substituted with 1-3 -OR groups, 3-6 membered cycloalkyl, or:
  • R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 5 is independently hydrogen or C 1-3 alkyl, or :
  • each R is independently hydrogen, C 1-4 aliphatic, or :
  • compounds of the invention may optionally be substituted with one or more substituents, such as are illustrated generally above, or as exemplified by particular classes, subclasses, and species of the invention. It will be appreciated that the phrase “optionally substituted” is used interchangeably with the phrase “substituted or unsubstituted.” In general, the term “substituted,” whether preceded by the term “optionally” or not, refers to the replacement of hydrogen radicals in a given structure with the radical of a specified substituent.
  • an optionally substituted group may have a substituent at each substitutable position of the group, and when more than one position in any given structure may be substituted with more than one substituent selected from a specified group, the substituent may be either the same or different at every position.
  • Combinations of substituents envisioned by this invention are preferably those that result in the formation of stable or chemically feasible compounds.
  • stable refers to compounds that are not substantially altered when subjected to conditions to allow for their production, detection, and preferably their recovery, purification, and use for one or more of the purposes disclosed herein.
  • a stable compound or chemically feasible compound is one that is not substantially altered when kept at a temperature of 40 °C or less, in the absence of moisture or other chemically reactive conditions, for at least a week.
  • aliphatic or "aliphatic group,” as used herein, means a straight-chain (i.e., unbranched) or branched, substituted or unsubstituted hydrocarbon chain that is completely saturated or that contains one or more units of unsaturation, or a monocyclic hydrocarbon or bicyclic hydrocarbon that is completely saturated or that contains one or more units of unsaturation, but which is not aromatic (also referred to herein as “carbocycle” "cycloaliphatic” or “cycloalkyl”), that has a single point of attachment to the rest of the molecule. Unless otherwise specified, aliphatic groups contain 1-20 aliphatic carbon atoms.
  • aliphatic groups contain 1-6 aliphatic carbon atoms. In yet other embodiments aliphatic groups contain 1-4 aliphatic carbon atoms.
  • cycloaliphatic refers to a monocyclic C 3 -Cs hydrocarbon or bicyclic C 8 -C 12 hydrocarbon that is completely saturated or that contains one or more units of unsaturation, but which is not aromatic, that has a single point of attachment to the rest of the molecule wherein any individual ring in said bicyclic ring system has 3-7 members.
  • Suitable aliphatic groups include, but are not limited to, linear or branched, substituted or unsubstituted alkyl, alkenyl, alkynyl groups and hybrids thereof such as (cycloalkyl)alkyl, (cycloalkenyl)alkyl or (cycloalkyl)alkenyl.
  • alkylene refers to a bivalent straight or branched saturated or unsaturated hydrocarbon chain. In some embodiments, an alkylene group is saturated.
  • exemplary aliphatic groups include, but are not limited to, ethynyl, 2-propynyl, 1-propenyl, 2-butenyl, 1,3-butadienyl, 2-pentenyl, vinyl (ethenyl), allyl, isopropenyl, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, sec-pentyl, neo-pentyl, tert-pentyl, cyclopentyl, hexyl, isohexyl, sec-hexyl, cyclohexyl, 2-methylpentyl, tert-hexyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1,3- dimethylbutyl, and 2,3-dimethyl but-2
  • heterocycle means non-aromatic, monocyclic, bicyclic, or tricyclic ring systems in which one or more ring members is an independently selected heteroatom.
  • the "heterocycle,” “heterocyclyl,” “heterocycloaliphatic,” or “heterocyclic” group has three to fourteen ring members in which one or more ring members is a heteroatom independently selected from oxygen, sulfur, nitrogen, or phosphorus, and each ring in the system contains 3 to 7 ring members.
  • a heterocyclic ring can be attached to its pendant group at any heteroatom or carbon atom that results in a stable structure and, when specified, any of the ring atoms can be optionally substituted.
  • saturated or partially unsaturated heterocyclic radicals include, without limitation, tetrahydrofuranyl, tetrahydrothiophenyl pyrrolidinyl, piperidinyl, pyrrolinyl, tetrahydroquinolinyl, tetrahydroisoquinolinyl, decahydroquinolinyl, oxazolidinyl, piperazinyl, dioxanyl, dioxolanyl, diazepinyl, oxazepinyl, thiazepinyl, morpholinyl, and quinuclidinyl.
  • heteroatom means one or more of oxygen, sulfur, nitrogen, phosphorus, or silicon (including, any oxidized form of nitrogen, sulfur, phosphorus, or silicon; the quaternized form of any basic nitrogen or; a substitutable nitrogen of a heterocyclic ring, for example N (as in 3,4-dihydro-2H-pyrrolyl), ⁇ (as in pyrrolidinyl) or NR + (as in N-substituted pyrrolidinyl).
  • partially unsaturated refers to a ring moiety that includes at least one double or triple bond.
  • partially unsaturated is intended to encompass rings having multiple sites of unsaturation, but is not intended to include aryl or heteroaryl moieties, as herein defined.
  • aryl used alone or as part of a larger moiety as in “aralkyl,” “aralkoxy,” or “aryloxyalkyl,” refers to monocyclic, bicyclic, and tricyclic ring systems having a total of five to fourteen ring members, wherein one or more ring in the system is aromatic and wherein each ring in the system contains 3 to 7 ring members.
  • aryl may be used interchangeably with the term “aryl ring”.
  • aryl also refers to heteroaryl ring systems as defined hereinbelow.
  • aryl refers to an aromatic ring system which includes, but not limited to, phenyl, biphenyl, naphthyl, anthracyl and the like, which may bear one or more substituents. Also included within the scope of the term “aryl,” as it is used herein, is a group in which an aromatic ring is fused to one or more non-aromatic rings, such as indanyl, phthalimidyl, naphthimidyl, phenanthridinyl, or tetrahydronaphthyl, and the like.
  • heteroaryl used alone or as part of a larger moiety as in “heteroaralkyl” or “heteroarylalkoxy,” refers to monocyclic, bicyclic, and tricyclic ring systems having a total of five to fourteen ring members, wherein one or more ring in the system is aromatic, one or more ring in the system contains one or more heteroatoms, and wherein each ring in the system contains 3 to 7 ring members.
  • heteroaryl may be used interchangeably with the term “heteroaryl ring” or the term “heteroaromatic”.
  • Heteroaryl groups include thienyl, furanyl, pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, indolizinyl, purinyl, naphthyridinyl, and pteridinyl.
  • heteroaryl and “heteroar-,” as used herein, also include groups in which a heteroaromatic ring is fused to one or more aryl, cycloaliphatic, or heterocyclyl rings.
  • Examplary heteroaryl rings include indolyl, isoindolyl, benzothienyl, benzofuranyl, dibenzofuranyl, indazolyl, benzimidazolyl, benzthiazolyl, quinolyl, isoquinolyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, 4H-quinolizinyl, carbazolyl, acridinyl, phenazinyl, phenothiazinyl, phenoxazinyl, tetrahydroquinolinyl, tetrahydroisoquinolinyl, and pyrido[2,3- b]- 1 ,4-oxazin-3 (4H)-one.
  • compounds of the invention may contain "optionally substituted” moieties.
  • substituted whether preceded by the term “optionally” or not, means that one or more hydrogens of the designated moiety are replaced with a suitable substituent.
  • an “optionally substituted” group may have a suitable substituent at each substitutable position of the group, and when more than one position in any given structure may be substituted with more than one substituent selected from a specified group, the substituent may be either the same or different at every position.
  • Combinations of substituents envisioned by this invention are preferably those that result in the formation of stable or chemically feasible compounds.
  • stable refers to compounds that are not substantially altered when subjected to conditions to allow for their production, detection, and, in certain embodiments, their recovery, purification, and use for one or more of the purposes disclosed herein.
  • Suitable monovalent substituents on R° are independently halogen, -(CH 2 ) 0 _ 2 R e , -(haloR*), -(CH 2 y 2 OH, -(CH 2 y 2 OR e , -(CH 2 y 2 CH(OR') 2 ; -0(haloR e ), -CN, -N 3 , -(CH 2 y 2 C(0)R e , -(CH 2 y 2 C(0)OH, -(CH 2 y 2 C(0)OR e , -(CH 2 y 2 SR e , -(CH 2 y 2 SH, -(CH 2 y 2 NH 2 , -(CH 2 y 2 NHR e , -(CH 2 y 2 NR' 2 , -N0 2 , -SiR' 3 ,
  • Suitable divalent substituents that are bound to vicinal substitutable carbons of an "optionally substituted” group include: -0(CR * 2 ) 2 _ 3 0-, wherein each independent occurrence of R is selected from hydrogen, Ci-6 aliphatic which may be substituted as defined below, or an unsubstituted 5-6-membered saturated, partially unsaturated, or aryl ring having 0 ⁇ 1 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
  • Suitable substituents on the aliphatic group of R include halogen, -R , -(haloR*), -OH, -OR", -O(haloR'), -CN, -C(0)OH, -C(0)OR e , -NH 2 , -NHR", -NR' 2 , or -
  • each R' is unsubstituted or where preceded by "halo" is substituted only with one or more halogens, and is independently Ci ⁇ aliphatic, -CH 2 Ph, -0(CH 2 )o_iPh, or a 5-6- membered saturated, partially unsaturated, or aryl ring having 0M heteroatoms independently selected from nitrogen, oxygen, or sulfur.
  • Suitable substituents on a substitutable nitrogen of an "optionally substituted" group include -R ⁇ , -NR ⁇ 2 , -C(0)R ⁇ , -C(0)OR ⁇ , -C(0)C(0)R ⁇ , -C(0)CH 2 C(0)R ⁇ , - S(0) 2 R ⁇ , -S(0) 2 NR ⁇ 2 , -C(S)NR ⁇ 2 , -C(NH)NR ⁇ 2 , or -N(R ⁇ )S(0) 2 R ⁇ ; wherein each R ⁇ is independently hydrogen, Ci_6 aliphatic which may be substituted as defined below, unsubstituted -OPh, or an unsubstituted 5-6-membered saturated, partially unsaturated, or aryl ring having C heteroatoms independently selected from nitrogen, oxygen, or sulfur, or, notwithstanding the definition above, two independent occurrences of R ⁇ , taken together with their intervening atom(s
  • Suitable substituents on the aliphatic group of R ⁇ are independently halogen, - R", -(haloR*), -OH, -OR", -O(haloR'), -CN, -C(0)OH, -C(0)OR e , -NH 2 , -NHR", -NR' 2 , or -N0 2 , wherein each R* is unsubstituted or where preceded by "halo" is substituted only with one or more halogens, and is independently Ci_4 aliphatic, -CH 2 Ph, -O(CH 2 ) 0 -iPh, or a 5-6-membered saturated, partially unsaturated, or aryl ring having 0M heteroatoms independently selected from nitrogen, oxygen, or sulfur.
  • structures depicted herein are also meant to include all isomeric (e.g., enantiomeric, diastereomeric, and geometric (or conformational)) forms of the structure; for example, the R and S configurations for each asymmetric center, (Z) and (E) double bond isomers, and (Z) and (E) conformational isomers. Therefore, single stereochemical isomers as well as enantiomeric, diastereomeric, and geometric (or conformational) mixtures of the present compounds are within the scope of the invention.
  • structures depicted herein are also meant to include compounds that differ only in the presence of one or more isotopically enriched atoms.
  • compounds having the present structures except for the replacement of hydrogen by deuterium or tritium, or the replacement of a carbon by a U C- or 13 C- or 14 C- enriched carbon are within the scope of this invention. Such compounds are useful, for example, as analytical tools or probes in biological assays. 3. Description of Exemplary Compounds
  • the present invention provides a compound of formula I having the stereochemistry depicted in formula I-a, below:
  • each R 1 is independently hydrogen, straight or branched Ci_ 6 alkyl, 3-6 membered cycloalkyl, or 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein each R 1 is optionally substituted with 1-4 R 2 groups, or:
  • R 1 groups are taken together to form a 3-7 membered heterocyclic ring having 0- 2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups;
  • each R 2 is as defined above and described herein.
  • each R 1 is hydrogen.
  • each R 1 is independently straight or branched Ci_ 6 alkyl, 3-6 membered cycloalkyl, or 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein each R 1 is optionally substituted with 1-4 R 2 groups, or:
  • R 1 groups are taken together to form a 3-7 membered heterocyclic ring having 0- 2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups; or
  • R 1 groups are taken together to form a 6-10 membered fused or spiro heterocyclic ring having 0-4 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups;
  • each R 2 is as defined above and described herein.
  • each R 1 is independently straight or branched Ci-6 alkyl optionally substituted with 1-4 R 2 groups.
  • each R 1 is independently straight or branched Ci_6 alkyl. In certain embodiments, each R 1 is independently straight or branched 0 1-5 alkyl. In certain embodiments, each R 1 is independently straight or branched C 1-4 alkyl. In certain embodiments, each R 1 is independently straight or branched C 1-3 alkyl. In certain embodiments, each R 1 is ethyl. In certain embodiments, each R 1 is methyl.
  • each R 1 is independently straight or branched Ci_6 alkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is independently straight or branched Ci-s alkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is independently straight or branched C 1-4 alkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is independently straight or branched C 1-3 alkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is ethyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is methyl substituted with 1-3 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3-6 membered cycloalkyl optionally substituted with 1-4 R 2 groups. [0041] In certain embodiments, each R 1 is independently 3-6 membered cycloalkyl. In certain embodiments, each R 1 is independently 3-5 membered cycloalkyl. In certain embodiments, each R 1 is independently 3-4 membered cycloalkyl.
  • each R 1 is cyclohexyl. In certain embodiments, each R 1 is cyclopentyl. In certain embodiments, each R 1 is cyclobutyl. In certain embodiments, each R 1 is cyclopropyl.
  • each R 1 is independently 3-6 membered cycloalkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is independently 3-5 membered cycloalkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein. In certain embodiments, each R 1 is independently 3-4 membered cycloalkyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is cyclohexyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.. In certain embodiments, each R 1 is cyclopentyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.. In certain embodiments, each R 1 is cyclobutyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.. In certain embodiments, each R 1 is cyclopropyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is optionally substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur. In certain embodiments, each R 1 is independently 3-5 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur. In certain embodiments, each R 1 is independently 3-4 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur. In certain embodiments, each R 1 is independently 6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur. In certain embodiments, each R 1 is independently 5 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • each R 1 is independently 4 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur. In certain embodiments, each R 1 is independently 3 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • each R 1 is independently piperidinyl, pyrrolidinyl, azetidinyl, or aziridinyl. In certain embodiments, each R 1 is independently tetrahydro-2H- pyranyl, tetrahydrofuranyl, or oxetanyl.
  • each R 1 is independently 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3-5 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3-4 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 5 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 4 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently 3 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur wherein each R 1 is substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently piperidinyl, pyrrolidinyl, azetidinyl, or aziridinyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • each R 1 is independently tetrahydro-2H- pyranyl, tetrahydrofuranyl, or oxetanyl substituted with 1-4 R 2 groups wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a 3-7 membered heterocyclic ring having 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups and wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a 3-6 membered heterocyclic ring having 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups and wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a 3-5 membered heterocyclic ring having 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups and wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a 3-4 membered heterocyclic ring having 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups and wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a azetidinyl ring optionally substituted with 1-3 R 2 groups wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a pyrrolidinyl ring optionally substituted with 1-3 R 2 groups wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a piperidinyl ring optionally substituted with 1-3 R 2 groups wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a piperazinyl ring optionally substituted with 1-3 R 2 groups wherein each R 2 is as defined above and described herein.
  • two R 1 groups are taken together to form a 6-10 membered fused or spiro heterocyclic ring having 0-4 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where R 1 groups are attached, wherein the ring is optionally substituted with 1-3 R 2 groups.
  • Exemplary - (R X )2 groups are depicted below, wherein each R 2 is as defined above and described herein.:
  • each R 2 is independently R, halogen, -C(0)N(R)2, -N(R) 2 , -OR, -NR 3 S(0) 2 R 3 , oxo, -C(0)OR, Ci_ 3 alkyl optionally substituted with 1-3 R 3 groups, 3-6 membered cycloalkyl, 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein the cycloalkyl and heterocyclyl are each optionally substituted with 1-3 R 3 , or:
  • R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 2 is independently R.
  • each R 2 is H.
  • each R 2 is independently halogen. In certain embodiments, each R 2 is independently -F. In certain embodiments, each R 2 is independently -CI. In certain embodiments, each R is independently -Br. In certain embodiments, each R 2 is independently -I.
  • each R 2 is independently -C(0)N(R) 2 .
  • each R 2 is -C(0)NH 2 .
  • each R 2 is independently -N(R) 2 .
  • each R 2 is -NH 2 .
  • each R 2 is independently -OR.
  • each R 2 is -OH.
  • each R 2 is independently — R 3 S(0) 2 R 3 .
  • each R 2 is -oxo.
  • each R 2 is independently -C(0)OR.
  • each R 2 is -C(0)OH.
  • each R 2 is independently C 1-3 alkyl optionally substituted with 1-3 R groups.
  • each R 2 is independently Ci
  • each R is independently Ci_ 3 alkyl substituted with 1-3 R 3 groups.
  • each R 2 is independently 3-6 membered cycloalkyl optionally substituted with 1-3 R 3 wherein each R 3 is as defined above and described herein.
  • each R 2 is independently cyclohexyl optionally substituted with 1-3 R 3 wherein each R 3 is as defined above and described herein.
  • each R 2 is independently cyclopentyl optionally substituted with 1-3 R 3 wherein each R 3 is as defined above and described herein.
  • each R 2 is independently cyclobutyl optionally substituted with 1-3 R 3 wherein each R 3 is as defined above and described herein.
  • each R 2 is independently cyclopropyl optionally substituted with 1-3 R 3 wherein each R 3 is as defined above and described herein.
  • each R 2 is 3-6 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein the heterocyclyl are each optionally substituted with 1-3 R 3 and wherein each R 3 is as defined above and described herein.
  • each R 2 is 3-5 membered saturated heterocyclyl having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein the heterocyclyl are each optionally substituted with 1-3 R 3 and wherein each R 3 is as defined above and described herein.
  • each R 2 is 3-4 membered saturated heterocyclyl having 1 -2 heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein the heterocyclyl are each optionally substituted with 1-3 R 3 and wherein each R 3 is as defined above and described herein.
  • each R 2 is independently piperidinyl, pyrrolidinyl, azetidinyl, or aziridinyl substituted with 1-3 R 3 groups wherein each R 3 is as defined above and described herein.
  • each R 2 is independently tetrahydro-2H- pyranyl, tetrahydrofuranyl, or oxetanyl substituted with 1-3 R 3 groups wherein each R 3 is as defined above and described herein.
  • each R 2 is independently piperidinyl, pyrrolidinyl, azetidinyl, or aziridinyl. In certain embodiments, each R 2 is independently tetrahydro-2H- pyranyl, tetrahydrofuranyl, or oxetanyl.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic ring.
  • two R 2 groups on the same carbon are taken together to form an optionally substituted cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, or cycloheptyl ring.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 2 groups on the same carbon are taken together to form an optionally substituted aziridinyl, azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring.
  • two R 2 groups on the same carbon are taken together to form an optionally substituted oxiranyl, oxetanyl, tetrahydrofuranyl or tetrahydro-2H-pyranyl ring.
  • each R 3 is independently hydrogen, halogen, -OR, 3-6 membered cycloalkyl, -N(R) 2 , C 1-3 alkyl optionally substituted with 1-3 R 4 groups, or: two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 3 is hydrogen.
  • each R 3 is independently halogen. In certain embodiments, each R 3 is independently -F. In certain embodiments, each R 3 is independently -CI. In certain embodiments, each R 3 is independently -Br. In certain embodiments, each R 3 is independently -I.
  • each R 3 is independently -OR.
  • each R 3 is -OH.
  • each R 3 is independently -N(R) 2 .
  • each R 3 is-NH2.
  • each R 3 is independently 3-6 membered cycloalkyl.
  • each R 3 is independently cyclohexyl, cyclopentyl, cyclobutyl or cyclopropyl.
  • each R 3 is independently C 1-3 alkyl optionally substituted with 1-3 R 4 groups.
  • each R 3 is independently C 1-3 alkyl. [0093] In certain embodiments, each R 3 is independently C 1-3 alkyl substituted with 1-3 R 4 groups.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic ring.
  • two R 3 groups on the same carbon are taken together to form an optionally substituted cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, or cycloheptyl ring.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 3 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur. [0098] In certain embodiments, two R 3 groups on the same carbon are taken together to form an optionally substituted aziridinyl, azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring.
  • two R 3 groups on the same carbon are taken together to form an optionally substituted oxiranyl, oxetanyl, tetrahydrofuranyl or tetrahydro-2H-pyranyl ring.
  • each R 4 is independently hydrogen, halogen, C 1-3 alkyl optionally substituted with 1-3 -OR groups, 3-6 membered cycloalkyl, or:
  • R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur;
  • each R 4 is hydrogen.
  • each R 4 is independently halogen. In certain embodiments, each R 4 is independently -F. In certain embodiments, each R 4 is independently -CI. In certain embodiments, each R 4 is independently -Br. In certain embodiments, each R 4 is independently -I.
  • each R 4 is independently C 1-3 alkyl optionally substituted with 1-3 -OR groups.
  • each R 4 is independently C 1-3 alkyl optionally substituted with 1-3 -OH groups.
  • each R 4 is independently 3-6 membered cycloalkyl.
  • each R 4 is independently cyclohexyl, cyclopentyl, cyclobutyl or cyclopropyl.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic or a 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered saturated carbocyclic ring.
  • two R 4 groups on the same carbon are taken together to form an optionally substituted cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, or cycloheptyl ring.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having 1-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-7 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-6 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon atom are taken together to form an optionally substituted 3-4 membered heterocyclic ring having one heteroatom independently selected from oxygen, nitrogen, or sulfur.
  • two R 4 groups on the same carbon are taken together to form an optionally substituted aziridinyl, azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring.
  • two R 4 groups on the same carbon are taken together to form an optionally substituted oxiranyl, oxetanyl, tetrahydrofuranyl or tetrahydro-2H-pyranyl ring.
  • each R 5 is independently hydrogen or C 1-3 alkyl, or: two R 5 groups on the same nitrogen atom are taken together to form an optionally substituted 3-5 membered heterocyclic ring.
  • each R 5 is hydrogen.
  • each R 5 is independently C 1-3 alkyl.
  • two R 5 groups on the same nitrogen atom are taken together to form an optionally substituted 3-5 membered carbocyclic ring.
  • the present invention provides a compound of formula or a pharmaceutically acceptable salt thereof, wherein each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula II having the stereochemistry depicted in formula Il-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula III having the stereochemistry depicted in formula Ill-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula IV having the stereochemistry depicted in formula IV-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula V:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula V having the stereochemistry depicted in formula V-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula VI having the stereochemistry depicted in formula Vl-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula VII:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • the present invention provides a compound of formula VII having the stereochemistry depicted in formula Vll-a, below:
  • each R 1 is defined above and in classes and subclasses described above and herein.
  • each R is independently hydrogen, C 1-4 aliphatic, or two R groups on the same nitrogen atom are taken together to form an optionally substituted 4-8 membered saturated or partially unsaturated ring.
  • each R is hydrogen.
  • each R is independently C 1-4 aliphatic.
  • two R groups on the same nitrogen are independently C 1-4 aliphatic which is optionally substituted with 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur.
  • two R groups on the same nitrogen atom are taken together to form an optionally substituted 4-8 membered saturated or partially unsaturated ring.
  • two R groups on the same nitrogen atom are taken together to form an optionally substituted 4-7 membered heterocyclic ring having 0-2 heteroatoms independently selected from oxygen, nitrogen, or sulfur in addition to the nitrogen atom where two R groups are attached.
  • two R groups on the same carbon are taken together to form an optionally substituted azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring.
  • two R groups on the same carbon are taken together to form an azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring optionally substituted with one or more -F groups.
  • two R groups on the same carbon are taken together to form an azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring optionally substituted with one or more optionally substituted C 1-3 alkyl groups.
  • two R groups on the same carbon are taken together to form an azetidinyl, pyrrolidinyl, piperidinyl or piperazinyl ring optionally substituted with one or more methoxy groups.
  • the compounds of this invention may be prepared or isolated in general by synthetic and/or semi-synthetic methods known to those skilled in the art for analogous compounds and by methods described in detail in the Examples, herein. Methods and intermediates of the present invention are useful for preparing compounds as described in, e.g. United States patent application serial number 13/040, 166, filed March 3, 2011, in the name of Bronk et al, the entirety of which is incorporated herein by reference.
  • oxygen protecting group includes, for example, carbonyl protecting groups, hydroxyl protecting groups, etc.
  • Hydroxyl protecting groups are well known in the art and include those described in detail in Protecting Groups in Organic Synthesis, T. W. Greene and P. G. M. Wuts, 3 rd edition, John Wiley & Sons, 1999, the entirety of which is incorporated herein by reference.
  • suitable hydroxyl protecting groups include, but are not limited to, esters, allyl ethers, ethers, silyl ethers, alkyl ethers, arylalkyl ethers, and alkoxyalkyl ethers.
  • esters include formates, acetates, carbonates, and sulfonates.
  • Specific examples include formate, benzoyl formate, chloroacetate, trifluoroacetate, methoxyacetate, triphenylmethoxyacetate, p- chlorophenoxyacetate, 3-phenylpropionate, 4-oxopentanoate, 4,4-(ethylenedithio)pentanoate, pivaloate (trimethylacetyl), crotonate, 4-methoxy-crotonate, benzoate, p-benzylbenzoate, 2,4,6-trimethylbenzoate, carbonates such as methyl, 9-fluorenylmethyl, ethyl, 2,2,2- trichloroethyl, 2-(trimethylsilyl)ethyl, 2-(phenylsulfonyl)ethyl, vinyl, allyl, and p-nitrobenzyl.
  • silyl ethers examples include trimethylsilyl, triethylsilyl, t-butyldimethylsilyl, t- butyldiphenylsilyl, triisopropylsilyl, and other trialkylsilyl ethers.
  • Alkyl ethers include methyl, benzyl, p-methoxybenzyl, 3,4-dimethoxybenzyl, trityl, t-butyl, allyl, and allyloxycarbonyl ethers or derivatives.
  • Alkoxyalkyl ethers include acetals such as methoxymethyl, methylthiomethyl, (2-methoxyethoxy)methyl, benzyloxymethyl, beta- (trimethylsilyl)ethoxymethyl, and tetrahydropyranyl ethers.
  • arylalkyl ethers include benzyl, p-methoxybenzyl (MPM), 3,4-dimethoxybenzyl, O-nitrobenzyl, p- nitrobenzyl, p-halobenzyl, 2,6-dichlorobenzyl, p-cyanobenzyl, and 2- and 4-picolyl.
  • Amino protecting groups are well known in the art and include those described in detail in Protecting Groups in Organic Synthesis, T. W. Greene and P. G. M. Wuts, 3 rd edition, John Wiley & Sons, 1999, the entirety of which is incorporated herein by reference.
  • Suitable amino protecting groups include, but are not limited to, aralkylamines, carbamates, cyclic imides, allyl amines, amides, and the like.
  • the amino protecting group of the R 10 moiety is phthalimido.
  • the amino protecting group of the R 10 moiety is a tert-butyloxycarbonyl (BOC) group.
  • the amino protecting group is a sulphone (SO2R).
  • black cohosh root also known as cimicifuga racemosa or actaea racemosa.
  • Commercial extracts, powders, and capsules of black cohosh root are available for treating a variety of menopausal and gynecological disorders.
  • certain compounds present in black cohosh root are useful for modulating and/or inhibiting amyloid-beta peptide production.
  • certain compounds have been isolated from black cohosh root and identified, wherein these compounds are useful as synthetic precursors en route to compounds useful for modulating and/or inhibiting amyloid-beta peptide production, and in particular amyloid-beta peptide (1-42). These compounds may be isolated and utilized in a form substantially free of other compounds normally found in the root.
  • methods of the present invention for use in preparing a compound of formula II use compounds found in extracts of black cohosh and related cimicifuga species, whether from roots and rhizome or aerial parts of these plants.
  • synthetic precursors may be obtained from one or more cimicifuga species including, but not limited to, Cimicifuga racemosa, Cimicifuga dahurica, Cimicifuga foetida, Cimicifuga heracleifolia, Cimicifuga japonica, Cimicifuga acerina, Cimicifuga acerima, Cimicifuga simplex, and Cimicifuga elata, Cimicifuga calthaefolia, Cimicifuga frigida, Cimicifuga laciniata, Cimicifuga mairei, Cimicifuga rubifolia, Cimicifuga americana, Cimicifuga biternata, and Cimicifuga bifida or
  • This may be accomplished either by chemical or biological transformation of an isolated compound or an extract fraction or mixture of compounds.
  • Chemical transformation may be accomplished by, but not limited to, manipulation of temperature, pH, and/or treatment with various solvents and/or reagents.
  • Biological transformation may be accomplished by, but not limited to, treatment of an isolated compound or an extract fraction or mixture of compounds with plant tissue, plant tissue extracts, other microbiological organisms or an isolated enzyme from any organism.
  • a precursor compound is extracted from a sample of biomass to provide a compound of formula A, as depicted in Scheme I below.
  • biomass refers to roots, rhizomes and/or aerial parts of the cimicifuga species of plant, as described above and herein.
  • the process of obtaining a compound of formula A from biomass comprises a step of pre-treating the biomass.
  • the step of pretreating comprises a step of drying.
  • the step of drying comprises use of one or more suitable methods for providing biomass of a desired level of dryness. For instance, in some embodiments the biomass is dried using vacuum. In some embodiments, the biomass is dried using heat. In some embodiments, the biomass is dried using a spray dryer or drum dryer. In some embodiments, the biomass is dried using two or more of the above methods.
  • the step of pretreating comprises a step of grinding.
  • the step of grinding comprises passing the sample of biomass through a chipper or grinding mill for an amount of time suitable to provide biomass of a desired particle size.
  • the biomass is dried prior to being ground to a suitable particle size.
  • a suitable particle size ranges from about 0.1 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.2 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.3 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.4 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.5 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.6 mm 3 to about 1.0 mm 3 .
  • a suitable particle size ranges from about 0.7 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.8 mm 3 to about 1.0 mm 3 . In some embodiments, a suitable particle size ranges from about 0.9 mm 3 to about 1.0 mm 3 .
  • a suitable particle size ranges from about 0.1 mm 3 to about 0.9 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.8 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.7 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.6 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.5 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.4 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.3 mm 3 . In some embodiments, a suitable particle size ranges from about 0.1 mm 3 to about 0.2 mm 3 .
  • biomass is dried and ground prior to being extracted.
  • extraction refers to the general process of obtaining a compound of formula A comprising a step of exposing biomass to one or more suitable solvents under suitable conditions for a suitable amount of time in order to extract a compound of formula A from the biomass.
  • extraction comprises agitating and heating a slurry comprised of biomass and one or more suitable solvents.
  • the one or more suitable solvents comprise one or more alcohols, and optionally water. Suitable alcohols include, but are not limited to, methanol, ethanol, isopropanol, and the like. In certain embodiments, the alcohol is methanol. In certain embodiments, the alcohol is ethanol.
  • the slurry is heated to a temperature of about 25 °C, 30 °C, 35 °C, 40 °C, 45 °C, 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C.
  • an elevated temperature is a temperature of greater than about 70 °C.
  • the slurry is heated to about 50 °C.
  • the slurry is kept at ambient temperature.
  • the biomass is exposed to one or more suitable solvents under suitable conditions for an amount of time ranging from about 0.1 h to about 48 h. In some embodiments, the amount of time ranges from about 0.1 h to about 36 h. In some embodiments, the amount of time ranges from about 0.1 h to about 24 h. In some embodiments, the amount of time ranges from about 0.5 h to about 24 h. In some embodiments, the amount of time ranges from about 1 h to about 24 h. In some embodiments, the amount of time ranges from about 2 h to about 24 h. In some embodiments, the amount of time ranges from about 2 h to about 22 h.
  • the amount of time ranges from about 2 h to about 20 h. In some embodiments, the amount of time ranges from about 2 h to about 4 h. In some embodiments, the amount of time ranges from about 20 h to about 24 h. In some embodiments, the amount of time is about 2 h. In some embodiments, the amount of time is about 22 h.
  • the slurry of biomass is heated and/or agitated for a suitable amount of time, the slurry is filtered through e.g., Celite, and concentrated down to the crude extract.
  • the crude extract is further treated with an aqueous salt solution such as, e.g., 5% aqueous KCl, and cooled to a temperature of about 2°C to about 10 °C.
  • aqueous salt solution such as, e.g., 5% aqueous KCl
  • Exemplary other salts for use in an aqueous salt solution include, but are not limited to, (NH 4 )S0 4 , K 2 S0 4 , NaCl, etc.
  • the aqueous salt solution has a concentration ranging from about 1% to about 50 %.
  • the aqueous salt solution has a concentration ranging from about 3% to about 30%. In some embodiments, the aqueous salt solution has a concentration ranging from about 5% to about 10%. In some embodiments, the aqueous salt solution has a concentration ranging from about 10% to about 20%. In some embodiments, the aqueous salt solution has a concentration ranging from about 20% to about 30%.
  • the crude extract is cooled to a temperature of about 2 °C to about 6 °C. In certain embodiments, the crude extract is cooled to a temperature of about 4 °C. In some embodiments, the crude extract is cooled for about 1, 2, 3, 4, or 5 h. In certain embodiments, the crude extract is cooled for about 2 h.
  • the crude extract is cooled for more than about 5 h. In certain embodiments, the crude extract is cooled for about 5 h to about 10 h. In certain embodiments, the crude extract is cooled for about 10 h to about 15 h. In certain embodiments, the crude extract is cooled for about 15 h to about 20 h. In certain embodiments, the crude extract is cooled for about 20 h to about 25 h. In some embodiments, after the crude extract is cooled for an appropriate amount of time, the slurry is centrifuged and the resulting solids are collected and dried using any one or more methods known in the art.
  • step S-l provides compound A in about 3-15% purity.
  • the present invention provides a method for obtaining a compound of formula A. In certain embodiments, the present invention provides a method for obtaining a compound of formula A from biomass comprising the step of contacting the biomass with one or more suitable solvents under suitable conditions for a suitable amount of time to obtain a compound of formula A.
  • compound A serves as starting material in the synthesis of a compound of formula I, as illustrated in Scheme II, below.
  • step S-2 of Scheme II a compound of formula A is converted by dehydration to provide carbonyl compound B, which is subsequently reduced at the ring carbonyl, then deprotected to provide intermediate C.
  • the oxygen protection of C in step S-4 provides D, wherein each variable is defined above and described in classes and subclasses above and herein, as illustrated in Scheme III, below.
  • step S-5 the tertiary free hydroxyl group of formula D is removed to provide olefin E, wherein each variable is defined above and described in classes and subclasses above and herein, followed by deacylation in step S-6 to provide F, wherein each variable is defined above and described in classes and subclasses above and herein.
  • intermediate F in step S-7 is coupled to provide carbamate G, wherein each variable is defined above and described in classes and subclasses above and herein, as illustrated in Scheme IV, below.
  • step S-8 the olefin is reduced and the oxygen protecting groups are removed by hydrogenation to provide intermediate H.
  • Step S-9 provides installation of another carbamate group to provide the compounds of formula I, wherein each variable is defined above and described in classes and subclasses above and herein.
  • compositions are provided.
  • compositions comprising any of the compounds as described herein, and optionally comprise a pharmaceutically acceptable carrier, adjuvant or vehicle.
  • these compositions optionally further comprise one or more additional therapeutic agents.
  • the term “pharmaceutically acceptable salt” refers to those salts which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response and the like, and are commensurate with a reasonable benefit/risk ratio.
  • a “pharmaceutically acceptable salt” means any non-toxic salt or salt of an ester of a compound of this invention that, upon administration to a recipient, is capable of providing, either directly or indirectly, a compound of this invention or a pharmaceutically active metabolite or residue thereof.
  • pharmaceutically active metabolite or residue thereof means that a metabolite or residue thereof is also a pharmaceutically active compound in accordance with the present invention.
  • compositions of this invention include those derived from suitable inorganic and organic acids and bases.
  • Examples of pharmaceutically acceptable, nontoxic acid addition salts are salts of an amino group formed with inorganic acids such as hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid and perchloric acid or with organic acids such as acetic acid, oxalic acid, maleic acid, tartaric acid, citric acid, succinic acid or malonic acid or by using other methods used in the art such as ion exchange.
  • inorganic acids such as hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid and perchloric acid
  • organic acids such as acetic acid, oxalic acid, maleic acid, tartaric acid, citric acid, succinic acid or malonic acid or by using other methods used in the art such as ion exchange.
  • salts include adipate, alginate, ascorbate, aspartate, benzenesulfonate, benzoate, bisulfate, borate, butyrate, camphorate, camphorsulfonate, citrate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, formate, fumarate, glucoheptonate, glycerophosphate, gluconate, hemisulfate, heptanoate, hexanoate, hydroiodide, 2-hydroxy-ethanesulfonate, lactobionate, lactate, laurate, lauryl sulfate, malate, maleate, malonate, methanesulfonate, 2- naphthalenesulfonate, nicotinate, nitrate, oleate, oxalate, palmitate, pamoate, pectinate
  • Salts derived from appropriate bases include alkali metal, alkaline earth metal, ammonium and N + (Ci_4 alkyl) 4 salts.
  • This invention also envisions the quaternization of any basic nitrogen-containing groups of the compounds disclosed herein. Water or oil-soluble or dispersable products may be obtained by such quaternization.
  • Representative alkali or alkaline earth metal salts include sodium, lithium, potassium, calcium, magnesium, and the like.
  • Further pharmaceutically acceptable salts include, when appropriate, nontoxic ammonium, quaternary ammonium, and amine cations formed using counterions such as halide, hydroxide, carboxylate, sulfate, phosphate, nitrate, loweralkyl sulfonate and aryl sulfonate.
  • compounds of the present invention may contain one or more acidic functional groups and, thus, may be capable of forming pharmaceutically-acceptable salts with pharmaceutically-acceptable bases.
  • pharmaceutically-acceptable salts in these instances refers to the relatively non-toxic, inorganic and organic base addition salts of compounds of the present invention. These salts can likewise be prepared in situ in the administration vehicle or the dosage form manufacturing process, or by separately reacting the purified compound in its free acid form with a suitable base, such as the hydroxide, carbonate or bicarbonate of a pharmaceutically-acceptable metal cation, with ammonia, or with a pharmaceutically-acceptable organic primary, secondary or tertiary amine.
  • a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically-acceptable metal cation, with ammonia, or with a pharmaceutically-acceptable organic primary, secondary or tertiary amine.
  • Representative alkali or alkaline earth salts include the lithium, sodium, potassium, calcium, magnesium, and aluminum salts and the like.
  • Representative organic amines useful for the formation of base addition salts include ethylamine, diethylamine, ethylenediamine, ethanolamine, diethanolamine, piperazine and the like. See, for example, Berge et ah, supra.
  • compositions of the present invention may additionally comprise a pharmaceutically acceptable carrier, adjuvant, or vehicle, which, as used herein, includes any and all solvents, diluents, or other liquid vehicle, dispersion or suspension aids, surface active agents, isotonic agents, thickening or emulsifying agents, preservatives, solid binders, lubricants and the like, as suited to the particular dosage form desired.
  • a pharmaceutically acceptable carrier, adjuvant, or vehicle which, as used herein, includes any and all solvents, diluents, or other liquid vehicle, dispersion or suspension aids, surface active agents, isotonic agents, thickening or emulsifying agents, preservatives, solid binders, lubricants and the like, as suited to the particular dosage form desired.
  • Remington's Pharmaceutical Sciences, Sixteenth Edition, E. W. Martin (Mack Publishing Co., Easton, Pa., 1980) discloses various carriers used in formulating pharmaceutically acceptable compositions and known techniques
  • any conventional carrier medium is incompatible with the compounds of the invention, such as by producing any undesirable biological effect or otherwise interacting in a deleterious manner with any other component(s) of the pharmaceutically acceptable composition, its use is contemplated to be within the scope of this invention.
  • materials which can serve as pharmaceutically acceptable carriers include, but are not limited to, ion exchangers, alumina, aluminum stearate, lecithin, serum proteins, such as human serum albumin, buffer substances such as phosphates, glycine, sorbic acid, or potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes, such as protamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinyl pyrrolidone, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, wool fat, sugars such as lactose, glucose and sucrose; starches such as corn starch and potato starch; cellulose and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate; powdered tragacanth; malt; gelatin; talc
  • compositions provided by the present invention can be employed in combination therapies, meaning that the present compositions can be administered concurrently with, prior to, or subsequent to, one or more other desired therapeutic agents or medical procedures.
  • the particular combination of therapies (therapeutic agents or procedures) to employ in a combination regimen will take into account compatibility of the desired therapeutic agents and/or procedures and the desired therapeutic effect to be achieved. It will also be appreciated that the therapies employed may achieve a desired effect for the same disorder (for example, a compound described herein may be administered concurrently with another therapeutic agent used to treat the same disorder), or they may achieve different effects (e.g., control of any adverse effects).
  • known agents useful for treating neurodegenerative disorders may be combined with the compositions of this invention to treat neurodegenerative disorders, such as Alzheimer's disease.
  • known agents useful for treating neurodegenerative disorders include, but are not limited to, treatments for Alzheimer's disease such as acetylcholinesterase inhibitors, including donepezil, Exelon ® and others; memantine (and related compounds as NMDA inhibitors), treatments for Parkinson's disease such as L-DOPA/carbidopa, entacapone, ropinrole, pramipexole, bromocriptine, pergolide, trihexephendyl, and amantadine; agents for treating Multiple Sclerosis (MS) such as beta interferon (e.g., Avonex ® and Rebif ® ), Copaxone ® , and mitoxantrone; riluzole, and antiparkinsonian agents.
  • MS Multiple Sclerosis
  • Additional examples of such known agents useful for treating neurodegenerative disorders include, but are not limited to, beta-secretase inhibitors/modulators, gamma- secretase inhibitors/modulators, HMG-CoA reductase inhibitors, NSAID's including ibuprofen, vitamin E, anti-amyloid antibodies, including humanized monoclonal antibodies, inhibitors/modulators of tau phosphorylation (such as GSK3 or CDK inhibitors/modulators) and/or aggregation, CB-1 receptor antagonists or CB-1 receptor inverse agonists, antibiotics such as doxycycline and rifampin, N-methyl-D-aspartate (NMDA) receptor antagonists, such as mematine, cholinesterase inhibitors such as galantamine, rivastigmnine, donepezil and tacrine, growth hormone secretagogues such as ibutamoren, ibutamoren mesylate and capromorelin, histamine H3
  • the compounds of the present invention are combined with other agents useful for treating neurodegenerative disorders, such as Alzheimer's disease, wherein such agents include beta-secretase inhibitors/modulators, gamma-secretase inhibitors/modulators, anti-amyloid antibodies, including humanized monoclonal antibodies aggregation inhibitors, metal chelators, antioxidants, and neuroprotectants and inhibitors/modulators of tau phosphorylation (such as GSK3 or CDK inhibitors/modulators) and/or aggregation.
  • agents useful for treating neurodegenerative disorders such as Alzheimer's disease
  • agents include beta-secretase inhibitors/modulators, gamma-secretase inhibitors/modulators, anti-amyloid antibodies, including humanized monoclonal antibodies aggregation inhibitors, metal chelators, antioxidants, and neuroprotectants and inhibitors/modulators of tau phosphorylation (such as GSK3 or CDK inhibitors/modulators) and/or aggregation.
  • compounds of the present invention are combined with gamma secretase modulators.
  • compounds of the present invention are gamma secretase modulators combined with gamma secretase modulators.
  • Exemplary such gamma secretase modulators include, inter alia, certain NSAIDs and their analogs (see WO01/78721 and US 2002/0128319 and Weggen et al, Nature, 414 (2001) 212-16; Morihara et al, J. Neurochem., 83 (2002), 1009-12; and Takahashi et al, J. Biol. Chem., 278 (2003), 18644-70).
  • the term “combination,” “combined,” and related terms refers to the simultaneous or sequential administration of therapeutic agents in accordance with this invention.
  • a compound of the present invention may be administered with another therapeutic agent simultaneously or sequentially in separate unit dosage forms or together in a single unit dosage form.
  • the present invention provides a single unit dosage form comprising a provided compound, an additional therapeutic agent, and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
  • agents the compounds of this invention may also be combined with include, without limitation: treatments for asthma such as albuterol and Singulair ® ; agents for treating schizophrenia such as zyprexa, risperdal, seroquel, and haloperidol; anti-inflammatory agents such as corticosteroids, TNF blockers, IL-1 RA, azathioprine, cyclophosphamide, and sulfasalazine; immunomodulatory and immunosuppressive agents such as cyclosporin, tacrolimus, rapamycin, mycophenolate mofetil, interferons, corticosteroids, cyclophosphamide, azathioprine, and sulfasalazine; neurotrophic factors such as acetylcholinesterase inhibitors, MAO inhibitors, interferons, anti-convulsants, ion channel blockers, agents for treating cardiovascular disease such as beta-blockers, ACE inhibitors, di
  • the amount of additional therapeutic agent present in the compositions of this invention will be no more than the amount that would normally be administered in a composition comprising that therapeutic agent as the only active agent. In certain embodiments, the amount of additional therapeutic agent in the present compositions will range from about 50% to 100% of the amount normally present in a composition comprising that agent as the only therapeutically active agent.
  • the methods of this invention that utilize compositions that do not contain an additional therapeutic agent comprise the additional step of separately administering to said patient an additional therapeutic agent.
  • additional therapeutic agents When these additional therapeutic agents are administered separately they may be administered to the patient prior to, sequentially with or following administration of the compositions of this invention.
  • compositions of this invention can be administered to humans and other animals orally, rectally, parenterally, intracisternally, intravaginally, intraperitoneally, topically (as by powders, ointments, or drops), bucally, as an oral or nasal spray, or the like, depending on the severity of the disorder being treated.
  • the compounds of the invention may be administered orally or parenterally at dosage levels of about 0.01 mg/kg to about 50 mg/kg and preferably from about 1 mg/kg to about 25 mg/kg, of subject body weight per day, one or more times a day, to obtain the desired therapeutic effect.
  • Liquid dosage forms for oral administration include, but are not limited to, pharmaceutically acceptable emulsions, microemulsions, solutions, suspensions, syrups and elixirs.
  • the liquid dosage forms may contain inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, dimethylformamide, oils (in particular, cottonseed, groundnut, corn, germ, olive, castor, and sesame oils), glycerol, tetrahydrofurfuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan, and mixtures thereof.
  • the oral compositions can also include adj
  • Injectable preparations for example, sterile injectable aqueous or oleaginous suspensions may be formulated according to the known art using suitable dispersing or wetting agents and suspending agents.
  • the sterile injectable preparation may also be a sterile injectable solution, suspension or emulsion in a nontoxic parenterally acceptable diluent or solvent, for example, as a solution in 1,3-butanediol.
  • the acceptable vehicles and solvents that may be employed are water, Ringer's solution, U.S. P. and isotonic sodium chloride solution.
  • sterile, fixed oils are conventionally employed as a solvent or suspending medium.
  • any bland fixed oil can be employed including synthetic mono- or diglycerides.
  • fatty acids such as oleic acid are used in the preparation of injectables.
  • the injectable formulations can be sterilized, for example, by filtration through a bacterial-retaining filter, or by incorporating sterilizing agents in the form of sterile solid compositions which can be dissolved or dispersed in sterile water or other sterile injectable medium prior to use.
  • a compound of the present invention In order to prolong the effect of a compound of the present invention, it is often desirable to slow the absorption of the compound from subcutaneous or intramuscular injection. This may be accomplished by the use of a liquid suspension of crystalline or amorphous material with poor water solubility. The rate of absorption of the compound then depends upon its rate of dissolution that, in turn, may depend upon crystal size and crystalline form. Alternatively, delayed absorption of a parenterally administered compound form is accomplished by dissolving or suspending the compound in an oil vehicle. Injectable depot forms are made by forming microencapsule matrices of the compound in biodegradable polymers such as polylactide-polyglycolide.
  • the rate of compound release can be controlled.
  • biodegradable polymers include poly(orthoesters) and poly(anhydrides).
  • Depot injectable formulations are also prepared by entrapping the compound in liposomes or microemulsions that are compatible with body tissues.
  • compositions for rectal or vaginal administration are preferably suppositories which can be prepared by mixing the compounds of this invention with suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at ambient temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at ambient temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • Solid dosage forms for oral administration include capsules, tablets, pills, powders, and granules.
  • the active compound is mixed with one or more inert, pharmaceutically acceptable excipient or carrier such as sodium citrate or dicalcium phosphate and/or a) fillers or extenders such as starches, lactose, sucrose, glucose, mannitol, and silicic acid, b) binders such as, for example, carboxymethylcellulose, alginates, gelatin, polyvinylpyrrolidinone, sucrose, and acacia, c) humectants such as glycerol, d) disintegrating agents such as agar— agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates, and sodium carbonate, e) solution retarding agents such as paraffin, f) absorption accelerators such as quaternary ammonium compounds, g) wetting agents such as, for example, cetyl
  • Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugar as well as high molecular weight polyethylene glycols and the like.
  • the solid dosage forms of tablets, dragees, capsules, pills, and granules can be prepared with coatings and shells such as enteric coatings and other coatings well known in the pharmaceutical formulating art. They may optionally contain opacifying agents and can also be of a composition that they release the active ingredient(s) only, or preferentially, in a certain part of the intestinal tract, optionally, in a delayed manner. Examples of embedding compositions that can be used include polymeric substances and waxes. Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugar as well as high molecular weight polethylene glycols and the like.
  • the active compounds can also be in micro-encapsulated form with one or more excipients as noted above.
  • the solid dosage forms of tablets, dragees, capsules, pills, and granules can be prepared with coatings and shells such as enteric coatings, release controlling coatings and other coatings well known in the pharmaceutical formulating art.
  • the active compound may be admixed with one or more inert diluent such as sucrose, lactose or starch.
  • Such dosage forms may also comprise, as is normal practice, additional substances other than inert diluents, e.g., tableting lubricants and other tableting aids such a magnesium stearate and microcrystalline cellulose.
  • the dosage forms may also comprise buffering agents. They may optionally contain opacifying agents and can also be of a composition that they release the active ingredient(s) only, or preferentially, in a certain part of the intestinal tract, optionally, in a delayed manner.
  • buffering agents include polymeric substances and waxes.
  • Dosage forms for topical or transdermal administration of a compound of this invention include ointments, pastes, creams, lotions, gels, powders, solutions, sprays, inhalants or patches.
  • the active component is admixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives or buffers as may be required.
  • Ophthalmic formulation, ear drops, and eye drops are also contemplated as being within the scope of this invention.
  • the present invention contemplates the use of transdermal patches, which have the added advantage of providing controlled delivery of a compound to the body.
  • Such dosage forms can be made by dissolving or dispensing the compound in the proper medium.
  • Absorption enhancers can also be used to increase the flux of the compound across the skin. The rate can be controlled by either providing a rate controlling membrane or by dispersing the compound in a polymer matrix or gel.
  • the present invention provides a composition containing a provided compound in an amount of about 1 weight percent to about 99 weight percent.
  • the composition contains a provided compound wherein the composition contains no more than about 10.0 area percent HPLC of other components of black cohosh root relative to the total area of the HPLC chromatogram.
  • the composition containing a provided compound contains no more than about 8.0 area percent HPLC of other components of black cohosh root relative to the total area of the HPLC chromatogram, and in still other embodiments, no more than about 3 area percent.
  • AD Alzheimer's Disease
  • A-beta amyloid-beta
  • APP amyloid protein precursor
  • gamma-secretase an enzyme termed gamma-secretase. Cleavage occurs at more than one site on APP producing different length A-beta peptides, some of which are more prone to deposition, such as A-beta 42. It is believed that aberrant production A-beta 42 in the brain leads to AD.
  • A-beta a 37-43 amino acid peptide derived by proteolytic cleavage of the amyloid precursor protein (APP), is the major component of amyloid plaques. APP is expressed and constitutively catabolized in most cells. APP has a short half-life and is metabolized rapidly down two pathways. In one pathway, cleavage by an enzyme known as alpha-secretase occurs while APP is still in the trans-Golgi secretory compartment. This cleavage by alpha- secretase occurs within the A-beta portion of APP, thus precluding the formation of A-beta.
  • alpha-secretase an enzyme known as alpha-secretase occurs while APP is still in the trans-Golgi secretory compartment. This cleavage by alpha- secretase occurs within the A-beta portion of APP, thus precluding the formation of A-beta.
  • A-beta 1-42 is more prone to aggregation than A-beta 1-40, the major component of amyloid plaque, and its production is closely associated with the development of Alzheimer's disease.
  • the bond cleaved by gamma-secretase appears to be situated within the transmembrane domain of APP.
  • APP is cleaved by beta-secretase to liberate sAPP-beta and CTF- beta, which CTF-beta is then cleaved by gamma-secretase to liberate the harmful A-beta peptide.
  • AD familial Alzheimer's disease
  • A-beta 42 is the 42 amino acid long form of A-beta that is believed to be more potent in forming amyloid plaques than the shorter forms of A-beta. Moreover, evidence suggests that intra- and extracellular A-beta are formed in distinct cellular pools in hippocampal neurons and that a common feature associated with two types of familial AD mutations in APP ("Swedish” and "London”) is an increased intracellular accumulation of A- beta 42.
  • A-beta-producing pathway is the position of the gamma-secretase cleavage. If the gamma- secretase proteolytic cut is at residue or before 711-712, shorter A-beta. (A-beta 40 or shorter) is the result; if it is a proteolytic cut after residue 713, long A-beta (A-beta 42) is the result. Thus, the .gamma secretase process is central to the production of A-beta peptide of 40 or 42 amino acids in length (A-beta 40 and A-beta 42, respectively).
  • Cleavage of APP can be detected in a number of convenient manners, including the detection of polypeptide or peptide fragments produced by proteolysis. Such fragments can be detected by any convenient means, such as by antibody binding.
  • Another convenient method for detecting proteolytic cleavage is through the use of a chromogenic beta secretase substrate whereby cleavage of the substrate releases a chromogen, e.g., a colored or fluorescent, product. More detailed analyses can be performed including mass spectroscopy.
  • Modulators of gamma-secretase may function in a variety of ways. They may block gamma. -secretase completely, or they may alter the activity of the enzyme so that less A-beta 42 and more of the alternative, soluble, forms of A-beta., such as A-beta 37, 38 or 39 are produced. Such modulators may thereby retard or reverse the development of AD.
  • Compounds are known, such as indomethacin, ibuprofen and sulindac sulphide, which reduce the production of A-beta 42 while increasing the production of A-beta 38 and leaving the production of A-beta 40 constant.
  • compounds of the present invention are useful gamma- secretase modulators.
  • compounds of the present invention modulate the action of gamma-secretase such that amyloid-beta (1-42) peptide production in a patient is attenuated.
  • compounds of the present invention modulate the action of gamma-secretase so as to selectively attentuate amyloid-beta (1-42) peptide production in a patient. In some embodiments, such selective attenuation occurs without significantly lowering production of the total pool of Abeta, or the specific shorter chain isoform amyloid-beta (1-40) peptide.
  • such selective attenuation results in secretion of amyloid beta which has less tendency to self-aggregate and form insoluble deposits, is more easily cleared from the brain, and/or is less neurotoxic.
  • the ability of compounds of the present invention to modulate gamma- secretase is beneficial in that there is a reduced risk of side effects with treatment resulting from, e.g., minimal disruption of other gamma-secretase controlled signaling pathways.
  • compounds of the present invention are gamma-secretase modulators useful for treating a patient suffering from AD, cerebral amyloid angiopathy, HCHWA-D, multi-infarct dementia, dementia pugilistica or traumatic brain injury and/or Down syndrome.
  • one or more compounds of the present invention are administered to a patient suffering from mild cognitive impairment or age-related cognitive decline or pre-symptomatic AD or prodromal or predementia AD (Dubois et al The Lancet Neurology 10 (2010) 70223-4 A favourable outcome of such treatment is prevention or delay of the onset of AD.
  • Age related cognitive decline and mild cognitive impairment (MCI) are conditions in which a memory deficit is present, but other diagnostic criteria for dementia are absent (Santacruz and Swagerty, American Family Physician, 63 (2001), 703-13).
  • age-related cognitive decline implies a decline of at least six months' duration in at least one of: memory and learning; attention and concentration; thinking; language; and visuospatial functioning and a score of more than one standard deviation below the norm on standardized neuropsychologic testing such as the MMSE.
  • compounds of the present invention are useful for modulating and/or inhibiting amyloid-beta (1-42) peptide production in a patient. Accordingly, compounds of the present invention are useful for treating, or lessening the severity of, disorders associated with amyloid-beta (1-42) peptide production in a patient.
  • the compounds of the present invention are useful for modulating and/or inhibiting amyloid-beta (1-40) peptide production in a patient. Accordingly, the compounds of the present invention are useful for treating, or lessening the severity of, disorders associated with amyloid-beta (1-40) peptide production in a patient. In some embodiments, compounds of the present invention do not modulate and/or inhibit amyloid-beta (1-40) peptide production in a patient.
  • the compounds of the present invention are useful for modulating and/or inhibiting amyloid-beta (1-38) peptide production in a patient. Accordingly, the compounds of the present invention are useful for treating, or lessening the severity of, disorders associated with amyloid-beta (1-38) peptide production in a patient.
  • the compounds of the present invention are useful for reducing both amyloid-beta (1-42) and amyloid beta (1-38). In some embodiments, the compounds of the present invention are useful for reducing amyloid-beta (1-42) and raising amyloid beta (1-38).
  • the compounds, extracts, and compositions, according to the method of the present invention may be administered using any amount and any route of administration effective for treating or lessening the severity of a neurodegenerative disorder.
  • the exact amount required will vary from subject to subject, depending on the species, age, and general condition of the subject, the severity of the infection, the particular agent, its mode of administration, and the like.
  • the present invention provides a method for modulating and/or inhibiting amyloid-beta (1-42) peptide production in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition comprising said compound.
  • the present invention provides a method of selectively modulating and/or inhibiting amyloid-beta (1-42) peptide production in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method of reducing amyloid-beta (1-42) peptide levels in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a cell, comprising contacting said cell with a provided compound.
  • Another embodiment provides a method for reducing amyloid-beta (1-42) in a cell without substantially reducing amyloid-beta (1-40) peptide levels in the cell, comprising contacting said cell with a provided compound.
  • Yet another embodiment provides a method for reducing amyloid-beta (1-42) in a cell and increasing one or more of amyloid-beta (1-37) and amyloid-beta (1-39) in the cell, comprising contacting said cell with a provided compound.
  • the term “reducing” or “reduce” refers to the relative decrease in the amount of an amyloid-beta achieved by administering a provided compound as compared to the amount of that amyloid-beta in the absence of administering a provided compound.
  • a reduction of amyloid-beta (1-42) means that the amount of amyloid-beta (1-42) in the presence of a provided compound is lower than the amount of amyloid-beta (1- 42) in the absence of a provided compound.
  • the present invention provides a method for selectively reducing amyloid-beta (1-42) peptide levels in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a patient without substantially reducing amyloid-beta (1-40) peptide levels, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a patient and increasing one or more of amyloid-beta (1-37) and amyloid-beta (1-39), wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a patient and increasing amyloid-beta (1-38), wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a patient and decreasing amyloid-beta (1-38), wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • an increase of amyloid-beta refers to the relative rise in the amount of an amyloid-beta achieved by administering a provided compound (or contacting a cell with a provided compound) as compared to the amount of that amyloid-beta in the absence of administering a provided compound (or contacting a cell with a provided compound).
  • an increase of amyloid-beta means that the amount of amyloid-beta (1-37) in the presence of a provided compound is higher than the amount of amyloid-beta (1-37) in the absence of a provided compound.
  • the relative amounts of either of amyloid-beta (1-37) and amyloid-beta (1-39) can be increased either by an increased production of either of amyloid- beta (1-37) and amyloid-beta (1-39) or by a decreased production of longer amyloid-beta peptides, e.g., amyloid-beta (1-40) and/or amyloid-beta (1-42).
  • the term "increasing" or “increase,” as used herein in reference to an amount of an amyloid-beta refers to the absolute rise in the amount of an amyloid-beta achieved by administering a provided compound.
  • the present invention provides a method for increasing the absolute level of one or more of amyloid-beta (1-37) and amyloid-beta (1-39), wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for increasing the level of one or more of amyloid-beta (1-37) and amyloid-beta (1-39), wherein the increase is relative to the amount of longer amyloid-beta peptides, e.g., amyloid-beta (1-40) and/or amyloid-beta (1- 42), or total amyloid-beta, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present compounds reduce the overall ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide.
  • another aspect of the present invention provides a method for reducing the ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide in a patient, comprising administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide is reduced from a range of about 0.1 to about 0.4 to a range of about 0.05 to about 0.08.
  • the present invention provides a method for reducing the ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide in a cell, comprising contacting the cell with a provided compound.
  • the ratio of amyloid- beta (1-42) peptide to amyloid-beta (1-40) peptide is reduced from a range of about 0.1 to about 0.4 to a range of about 0.05 to about 0.08.
  • the present invention provides a method for treating or lessening the severity of a disorder associated with amyloid-beta (1-42) peptide, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • disorders include neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease, and Down's syndrome.
  • Such disorders also include inclusion body myositis (deposition of A-beta in peripheral muscle, resulting in peripheral neuropathy), cerebral amyloid angiopathy (amyloid in the blood vessels in the brain), and mild cognitive impairment and pre-symptomatic, prodromal or predementia AD.
  • High A-beta42 is a measurable condition that precedes symptomatic disease, especially in familial patients, based on plasma, CSF measurements, and/or genetic screening or brain imaging. This concept is analogous to the relationship between elevated cholesterol and heart disease.
  • another aspect of the present invention provides a method for preventing a disorder associated with elevated amyloid-beta (1-42) peptide, wherein said method comprises administering to said patient a provided compound or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for treating diseases where A-beta amyloidosis may be an underlying aspect or a co-existing and exacerbating factor, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present invention provides a method for treating a disorder in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof, and wherein said disorder is Lewy body dementia (associated with deposition of alpha-synuclein into Lewy bodies in cognitive neurons; a-synuclein is more commonly associated with deposits in motor neurons and the etiology of Parkinson's disease), Parkinson's disease, cataract (where a-beta is aggregating in the eye lens), age-related macular degeneration, Tauopathies (e.g.
  • Type 2 diabetes IAPP aggregates in pancreatic islets, is similar in size and sequence to A-beta and having type 2 diabetes increases risk of dementia
  • TTR transthyretin amyloid disease
  • prion disease including Creutzfeldt-Jakob disease, Gerstmann-Straussler-Scheinker syndrome, fatal familial insomnia, and kuru
  • CJD CJD.
  • the present invention provides a method for treating a disorder in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof, and wherein said disorder is mild cognitive impairment, pre-symptomatic AD, prodromal or predementia AD, Trisomy 21 (Down Syndrome), cerebral amyloid angiopathy, degenerative dementia, Hereditary Cerebral Hemorrhage with Amyloidosis of the Dutch-Type (HCHWA-D), Creutzfeld- Jakob disease, prion disorders, amyotrophic lateral sclerosis, progressive supranuclear palsy, head trauma, stroke, Down syndrome, pancreatitis, inclusion body myositis, other peripheral amyloidoses, diabetes and atherosclerosis, cerebral amyloid angiopathy, HCHWA-D, multi- infarct dementia, and/or dementia pugilistica, or traumatic brain injury.
  • said disorder is mild cognitive impairment, pre-symptomatic AD, prodromal or pre
  • the present invention provides a method for treating or lessening the severity of Alzheimer's disease in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the present compounds are modulators of gamma-secretase which selectively reduce levels of amyloid-beta (1-42).
  • another embodiment of the present invention provides a method of modulating gamma-secretase in a patient, comprising administering to said patient a provided compound, or pharmaceutically acceptable composition thereof.
  • the present compounds are inhibitors of gamma-secretase.
  • Said method is useful for treating or lessening the severity of any disorder associated with gamma-secretase.
  • disorders include, without limitation, neurodegenerative disorders, e.g. Alzheimer's disease.
  • disorders include cerebral amyloid angiopathy, HCHWA-D, multi-infarct dementia, dementia pugilistica, traumatic brain injury and/or Down syndrome.
  • Notch/Delta signaling pathway is highly conserved across species and is widely used during both vertebrate and invertebrate development to regulate cell fate in the developing embryo. See Gaiano and Fishell, "The Role of Notch in Promoting Glial and Neural Stem Cell Fates" Annu. Rev. Neurosci. 2002, 25:471-90. Notch interacts with the gamma-secretase complex and has interactions with a variety of other proteins and signaling pathways. Notchl competes with the amyloid precursor protein for gamma-secretase and activation of the Notch signaling pathway down-regulates PS-1 gene expression.
  • Notch receptors are processed by gamma-secretase acting in synergy with T cell receptor signaling and thereby sustain peripheral T cell activation.
  • Notchl can directly regulate Tbx21 through complexes formed on the Tbx21 promoter. See Minter et al, "Inhibitors of ⁇ -secretase block in vivo and in vitro T helper type 1 polarization by preventing Notch upregulation of Tbx21," Nature Immunology 2005, 7:680-688.
  • gamma- secretase inhibitors In vitro, gamma- secretase inhibitors extinguished expression of Notch, interferon-gamma and Tbx21 in TH1- polarized CD4+ cells. In vivo, administration of gamma-secretase inhibitors substantially impeded TH1 -mediated disease progression in the mouse experimental autoimmune encephalomyelitis model of multiple sclerosis suggesting the possibility of using such compounds to treat TH1 -mediated autoimmunity See Id.
  • Inhibition of gamma-secretase can alter lymphopoiesis and intestinal cell differentiation (Wong et al, "Chronic Treatment with the ⁇ -Secretase Inhibitor LY-41 1,575 Inhibits ⁇ -Amyloid Peptide Production and Alters Lymphopoiesis and Intestinal Cell Differentiation" Journal of Biological Chemistry 2004, 26: 12876-12882), including the induction of goblet cell metaplasia.
  • Thl cells are involved in the pathogenesis of a variety of organ-specific autoimmune disorders, Crohn's disease, Helicobacter pylori-induced peptic ulcer, acute kidney allograft rejection, and unexplained recurrent abortions, to name a few.
  • the invention relates to a method of inhibiting the formation of Thl cells in a patient comprising the step of administering to said patient a compound of the present invention, or a composition comprising said compound.
  • the present invention provides a method for treating one or more autoimmune disorders, including irritable bowel disorder, Crohn's disease, rheumatoid arthritis, psoriasis, Helicobacter pylori- induced peptic ulcer, acute kidney allograft rejection, multiple sclerosis, or systemic lupus erythematosus, wherein said method comprises administering to said patient a provided compound, prepared according to methods of the present invention, or a pharmaceutically acceptable composition comprising said compound.
  • the present invention provides a method for modulating and/or inhibiting amyloid-beta peptide production, without affecting the release of Notch intracellular domain (NICD) following the processing of Notch are highly desirable, in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition comprising said compound.
  • NBD Notch intracellular domain
  • the present invention provides a method for inhibiting amyloid-beta (1-42) peptide production, without affecting the release of Notch intracellular domain (NICD) following the processing of Notch are highly desirable, in a patient, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition comprising said compound.
  • the present invention provides a method for reducing amyloid-beta (1-42) peptide levels in a patient and increasing one or more of amyloid-beta (1-37) and amyloid-beta (1-39), without affecting the release of Notch intracellular domain (NICD) following the processing of Notch are highly desirable, wherein said method comprises administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • another aspect of the present invention provides a method for reducing the ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide in a patient, without affecting the release of Notch intracellular domain (NICD) following the processing of Notch, comprising administering to said patient a provided compound, or a pharmaceutically acceptable composition thereof.
  • the ratio of amyloid-beta (1-42) peptide to amyloid-beta (1-40) peptide is reduced from a range of about 0.1 to about 0.4 to a range of about 0.05 to about 0.08.
  • the compounds of the invention are preferably formulated in dosage unit form for ease of administration and uniformity of dosage.
  • dosage unit form refers to a physically discrete unit of agent appropriate for the patient to be treated. It will be understood, however, that the total daily usage of the compounds and compositions of the present invention will be decided by the attending physician within the scope of sound medical judgment.
  • the specific effective dose level for any particular patient or organism will depend upon a variety of factors including the disorder being treated and the severity of the disorder; the activity of the specific compound employed; the specific composition employed; the age, body weight, general health, sex and diet of the patient; the time of administration, route of administration, and rate of excretion of the specific compound employed; the duration of the treatment; drugs used in combination or coincidental with the specific compound employed, and like factors well known in the medical arts.
  • patient means an animal, preferably a mammal, and most preferably a human.
  • This extract is substantially equivalent to the USP preparation of black cohosh extract, in which about 50% aqueous ethanol is used to extract powdered root and then concentrated to near dryness.
  • Other abbreviations include: AC2O (acetic anhydride), DMAP (dimethylaminopyridine), PhI(OAc)2 (iodosobenzene diacetate), PDC (pyridinium dichromate), TFAA (trifluoroacetic acid), DMDO (dimethyldioxirane), DIPEA ( ⁇ , ⁇ -Diisopropylethylamine), RB (round-bottom), TLC (thin layer chromatography), MeOH (methanol), MeOD (methanol d-4), /-PrOH (isopropanol), TBDMS (tert-butyldimethylsilyl-), TBS (tert-butyldimethylsilyl-), DHEA (dehydroepiandrosterone), TBHP (tert-but
  • Standard LC conditions utilized CH 3 CN with 0.1% formic acid as the organic phase and water containing 0.1% formic acid as the aqueous phase, and were run as follows: Flow rate 1.000 mL/min; 0-1.80 minutes 2-98% organic-aqueous; 1.80-3.75 minutes 98% organic-aqueous, 3.75-3.76 minutes 98-2% organic-aqueous; 3.76- 4.25 minutes 2% organic-aqueous.
  • LC/MS samples included here are of reaction mixtures pre-workup unless otherwise noted. Automatic integration over the entire non-background signal is included here, and selected key masses for individual regions have been added manually. NMR spectra were acquired using a Varian 400 MHz instrument and are acquired
  • the black cohosh biomass was first dried and ground to a suitable particle size usually ranging from about 0.1 to about 1.0 mm 3 . This may be accomplished by passage through a chipper or a grinding mill.
  • the ground biomass (1.88 kg) was extracted with tech grade methanol (9.4 L) at 50°C for 2 hours.
  • tech grade methanol 9.4 L
  • Other polar solvent such as an alcohol, preferably 95% ethanol could also be used.
  • the extraction could also be done at RT for 22 hours.
  • the extract solution was filtered through Celite using a basket centrifuge. The filter cake was rinsed with tech grade methanol and the filtrates were combined.
  • the clear, homogeneous, dilute methanol extract was concentrated under vacuum with a maximum temperature of 33 °C reached, which provided 1.3 L of concentrated solution with suspended solids visible.
  • the concentrated extract was added slowly to 5% KC1 solution in water (5.2 L) and the resulting mixture was cooled to 4 °C and held for 2 hours.
  • Other salts can also be used, including but not limited to, (NH 4 ) 2 S0 4 , K 2 S0 4 , NaCl, etc.
  • the concentration of salt in water can range from 3% to 30%.
  • the holding time can range from 2 to 24 hours.
  • the precipitate containing compound A was formed, which was collected using a centrifuge and rinsed with water.
  • An aqueous salt solution can also be used to rinse the solid, including but not limited to, 0 - 30 % ( H 4 ) 2 S0 4 , K 2 S0 4 , KC1, NaCl, etc. Sometimes Celite was added as filter aid to facilitate the filtration.
  • the collected solids were transferred to a dryer which provided 71 g of dry solid.
  • the type of dryer which can be used includes but is not limited to a spray dryer, drum dryer, etc.
  • Method S2-A To a solution of the solid obtained from S-l (20.3 g, 13% A) in CH2CI2 (162 mL) was added ZrCl 4 (1.32 g) at 20 °C in three portions over 1 h. The mixture was stirred at 20 °C for additional 35 min and Celite (7.1 g) was added, followed by addition of Et 3 (5 mL) within 5-15 min. The solids were filtered off and washed with CH2CI2 (100 mL). The filtrates were combined and washed with half saturated aHC0 3 (100 mL). The aqueous layer was back extracted with CH2CI2 (25 mL).
  • Method S2-B Alternatively, the solid obtained from S-l (32 g, 13% A) was dissolved in DMSO (70 mL), filtered through Celite and purified by reverse phase chromatography with C-18 column (40-63 ⁇ , 18.2 cm x 45 cm) using 60 - 70% MeOH/water as eluents. The fractions were analyzed using the analytical HPLC conditions described above. The selected fractions were combined and concentrated to about half of the original volume (1.1 L). NaCl (143 g) was added and the resulting mixture was extracted with CH2CI2 (2 x 340 mL). The combined organic phase was concentrated to dryness.
  • HC1 (cone) (15 mL) was added to El-i (8.2 g, 12.3 mmol) in CH 3 CN (60 mL) and allowed to stir for 1 h.
  • the reaction mixture was partitioned between 400 mL each CH 2 CL 2 and water.
  • the organic layer was washed with aHC0 3 , then dried over Na 2 S0 4 , filtered, concentrated and purified by biotage chromatography to give pure El-ii (2.8 g, 43%).
  • TESC1 (486 mg, 3.24 mmol) was added to triol (840 mg, 1.58 mmol) plus imidazole (537 mg, 7.89 mmol) in CH2CI2 (10 mL).
  • TLC showed good balance of conversion to the desired bis-silyl ether and tri-protection after 1 hour.
  • Water 50 mL was added and the mixture was extracted with CH2CI2 (3 x 20 mL). The combined organic layers were dried over Na 2 S0 4; filtered and concentrated to give El-iii which was purified by chromatography (750 mg, 62.5%).
  • Step El -7
  • -Diluted conditioned media 1 part media with 1% DMSO and 1 part blocking buffer;
  • BUFFERS All reagents were in kit.
  • ⁇ peptide levels for each peptide were calculated from the standard curve using the MSD software provided with the MSD 2400 Imager. Percent vehicle values for each compound dosage were then calculated and fit to a 4 parameter curve generating IC50 values.
  • conditioned media in the tissue culture plate was added 100 ⁇ , of CellTiter-Glo reagent from Promega.
  • the plate was placed on an orbital rotator operating at 500 rpms for 2 minutes.
  • the plate was left static for 10 minutes and then 150 ⁇ L of the lysates were transferred to a white plate and read in a luminometer.
  • Biological Activity Data (Table 3): Compounds having an activity designated as "A” provided an IC5 0 ⁇ 100 nM; compounds having an activity designated as “B” provided an IC5 0 of 100 - 500 nM; compounds having an activity designated as “C” provided an IC5 0 of 501 - 1000 nM; compounds having an activity designated as "D” provided an IC5 0 of 1001

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Abstract

La présente invention concerne des composés de la formule (I) ou un sel de qualité pharmaceutique de ceux-ci, R1 et R5 étant tels que définis et décrits dans la présente invention, des compositions à base de ces composés et leurs procédés d'utilisation.
PCT/US2012/054007 2011-09-07 2012-09-06 Composés utiles pour traitement de troubles neurodégénératifs WO2013036674A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937341A (en) * 1989-09-28 1990-06-26 Hoechst-Roussel Pharmaceuticals Inc. Process for preparing N-aminocarbarbamates related to physostigmine
US20100144689A1 (en) * 2005-05-17 2010-06-10 Satori Pharmaceuticals, Inc. Compounds useful for treating neurodegenerative disorders
US20110054025A1 (en) * 2008-03-28 2011-03-03 Consejo Superior De Investigaciones Cientificas Use of a pentacyclic triterpene in a pharmaceutical composition for the treatment of multiple sclerosis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937341A (en) * 1989-09-28 1990-06-26 Hoechst-Roussel Pharmaceuticals Inc. Process for preparing N-aminocarbarbamates related to physostigmine
US20100144689A1 (en) * 2005-05-17 2010-06-10 Satori Pharmaceuticals, Inc. Compounds useful for treating neurodegenerative disorders
US20110054025A1 (en) * 2008-03-28 2011-03-03 Consejo Superior De Investigaciones Cientificas Use of a pentacyclic triterpene in a pharmaceutical composition for the treatment of multiple sclerosis

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BAR-ON ET AL.: "Kinetic and Structural Studies on the Interaction of Cholinesterases with the Anti-Alzheimer Drug Rivastigmine", BIOCHEMISTRY, vol. 41, 2002, pages 3555 - 3564 *

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